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From "Kevin Wilfong (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-2430) Performance degradation in stats DB after JIRA HIVE-2144 (https://issues.apache.org/jira/browse/HIVE-2144)
Date Wed, 07 Sep 2011 18:25:14 GMT

     [ https://issues.apache.org/jira/browse/HIVE-2430?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kevin Wilfong updated HIVE-2430:
--------------------------------

    Attachment: HIVE-2430.1.patch.txt

> Performance degradation in stats DB after JIRA HIVE-2144 (https://issues.apache.org/jira/browse/HIVE-2144)
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-2430
>                 URL: https://issues.apache.org/jira/browse/HIVE-2430
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Kevin Wilfong
>            Assignee: Kevin Wilfong
>         Attachments: HIVE-2430.1.patch.txt
>
>
> After JIRA HIVE-2144 (https://issues.apache.org/jira/browse/HIVE-2144), the performance
in stats DB degraded significantly due to MySQL's inefficient index maintenance. 
> We should remove the primary index introduced in that JIRA and resolve duplicates in
the stats aggregation
> phase. 

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